15 notable Republicans who back gay marriage — and the only one who matters

Sen. Lisa Murkowski of Alaska, the top ranking Republican on the Senate Committee on Energy and Natural Resources, speaks to reporters about her blueprint for U.S. energy policy, titled "Energy 20/20," at the Capitol in Washington, Monday, Feb. 4, 2013. (AP Photo/J. Scott Applewhite)

15 notable Republicans who back gay marriage — and the only one who matters

Few issues have historically divided Democrats and Republicans as much as gay marriage. The overwhelming number of supporters are Democrats, while most Republicans oppose it.Still, a few members of the Grand Old Party have bucked the party line.Here are 15 of the highest-serving Republican officials to support gay marriage — and the only one who matters. Alaska Sen. Lisa MurkowskiLisa Murkowski (AP)Sen. Lisa Murkowski hinted at a shift in her stance back in March 2013 and officially stated her new …